package com.hmdp.utils;


import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//        //1、获取请求头里面的token
//        String token = request.getHeader("Authorization");
//        if(StrUtil.isBlank(token)){
//            response.setStatus(401);
//            return false;
//        }
//        //2、基于token获取redis中的用户
//        String key = RedisConstants.LOGIN_USER_KEY + token;
//        Map<Object, Object> userMap = stringRedisTemplate.opsForHash()
//                .entries(RedisConstants.LOGIN_USER_KEY + token);
//        //3、判断用户是否存在
//        if (userMap.isEmpty()){
//            //4、不存在拦截
//            response.setStatus(401);
//            return false;
//        }
//        //5、将查询到的用户转换为UserDTO
//        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap,new UserDTO(), false);
//        //6、存在 将用户信息放到threadLocal中去
//        UserHolder.saveUser(userDTO);
//
//        //7、刷新token有效期
//        stringRedisTemplate.expire(key,RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);
//        //8、放行
        //判断是否要拦截
        if(UserHolder.getUser() == null){
            response.setStatus(401);
            return false;
        }
        //放行
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
        //移除用户
        UserHolder.removeUser();
    }
}
